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- W2372037342 abstract "Vibroseis seismic signals often include harmonic distortions.The higher order harmonics need to be removed while maintaining the desired signal to improve the seismic resolution.The Hilbert-Huang method can be used to remove harmonic distortions from vibroseis signals.The vibroseis signals are processed using empirical mode decomposition(EMD) and Hilbert transforms to get the Hilbert-Huang spectrum.After recognizing and removing the higher order harmonics in the time-frequency domain,and an inverse Hilbert transform is used to get the intrinsic mode functions(IMF) without harmonics.Then addiction is used to obtain the signals without higher order in a fundamental wave with a frequency consistent with the original signal.A cross-correlation after removal of the higher order harmonics shows that the higher order harmonics in cross correlation are correspondingly removed,so that the main-lobe of the correlation function is prominent and the side-lobe is small,so this signal can be used to more accurate calculate the time delay and velocity." @default.
- W2372037342 created "2016-06-24" @default.
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- W2372037342 date "2011-01-01" @default.
- W2372037342 modified "2023-09-26" @default.
- W2372037342 title "Removal of harmonic distortions in vibroseis data using the Hilbert-Huang transformation" @default.
- W2372037342 hasPublicationYear "2011" @default.
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